I use what I call the "jerky slab" out of the hams. this is a near perfectly rectangular muscle in the very back of the ham that is about perfect for making jerky as it has no intersecting sinew or marbling. Directly in front of this is a round muscle that is great for making either jerky or you can roll it in pepper, paprika, or season, hang, and dry it to make a pastrami like piece of dried meat. Not pastrami like we think of for a sandwich, but in Europe, they call dried and/or preserved meat pastrami.
Anyhow for jerky, remove trim and nearly freeze this rectangular muscle until it is barely bendable. Slice this into 1/8" thick slices and place in bowl. Add marinade and let marinade for a day or so in the fridge then put sliced meat in a dehydrator and process until dried.
Teriyaki/Black Pepper marinade:
Mix together whole bottle of Teriyaki sauce, half bottle of Soy sauce, 1/2 Cup Worcestershire sauce, 2 tbsp Onion powder, 2 - 4 tbsp coarse ground black pepper (depending on how peppery you want it), dash of Liquid Smoke.